Hi John, SIPPING-ers, draft-ietf-sipping-update-pai-07 mentions that P-Asserted-Identity header field values with unexpected URI schemes should be ignored. Furthermore, only SIP, SIPS and tel are expected URI schemes. RFC 5031 introduces service URNs allowing well-known context-dependent services to be resolved. If a well-known content-dependant service populates a P-Asserted-Identity header field or a proxy populates it on behalf of the service, how should the header field be populated? It would be useful if the service URN is allowed as an entry into the P-Asserted-Identity. Would allowing service URNs in the P-Asserted/Preferred-Identity header field be a useful addition to this draft? Regards, John-Luc _______________________________________________ Sipping mailing list https://www.ietf.org/mailman/listinfo/sipping This list is for NEW development of the application of SIP Use sip-implementors@xxxxxxxxxxxxxxx for questions on current sip Use sip@xxxxxxxx for new developments of core SIP